| 1 | //===-- Implementation of putc --------------------------------------------===// |
|---|---|
| 2 | // |
| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| 4 | // See https://llvm.org/LICENSE.txt for license information. |
| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| 6 | // |
| 7 | //===----------------------------------------------------------------------===// |
| 8 | |
| 9 | #include "src/stdio/putc.h" |
| 10 | #include "src/__support/File/file.h" |
| 11 | |
| 12 | #include "src/errno/libc_errno.h" |
| 13 | #include <stdio.h> |
| 14 | |
| 15 | namespace LIBC_NAMESPACE { |
| 16 | |
| 17 | LLVM_LIBC_FUNCTION(int, putc, (int c, ::FILE *stream)) { |
| 18 | unsigned char uc = static_cast<unsigned char>(c); |
| 19 | |
| 20 | auto result = reinterpret_cast<LIBC_NAMESPACE::File *>(stream)->write(data: &uc, len: 1); |
| 21 | if (result.has_error()) |
| 22 | libc_errno = result.error; |
| 23 | size_t written = result.value; |
| 24 | |
| 25 | if (1 != written) { |
| 26 | // The stream should be in an error state in this case. |
| 27 | return EOF; |
| 28 | } |
| 29 | return 0; |
| 30 | } |
| 31 | |
| 32 | } // namespace LIBC_NAMESPACE |
| 33 |